Improvement in ventilating dampers and registers



W. J. TOWNE.

Ventilating Damper.

Patent-ed Aug. 30, 1864.

No. 44,030. I

' "wat UNITED STATES VILLIAM J. TOVVNE, OF NEWTON, MASSACHUSETTS.

IMPROVEMENT IN VENTILATING DAMPERS AND REGISTERS.

Specification forming part of Letters Patent No. 44,030, dated August 30, 1864.

To all whom it may concern:

Be it known that I WILLIAM J. TowNE, of Newton, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Ventilating Registers and Dampers for Stoves and Furnaces, of which the following is afull, clear, and exact description, reference being had to the accompanying drawings, making part of this specification, in which- Figure l is a perspective view of my improved ventilating register and damper 5 Fig. 2, a central vertical section through the same.

My invention relates to an improvementin ventilating registers and dampers for stoves and furnaces for which Letters Patent of the United States were granted to John Magee on the '20th day of May, A. D. 1856, in which a hat damper was used. This was liable to the objection that when placed in a damp situation-as in a cellar-the gases andimpurities from the coal would be condensed, collect on the damper, and run down tothe spindle or bearings on which it was hung, and rust and clog them and soon destroyv them. The rack by which the damper was held in position was also required to be very nicely fitted in order that the flatdamper might be closed perfectly tight when there was very little draft, and the crank ot' the damper was liable to slip out of the notches in the rack if subjected to any jar or by the wind shaking it, when the damper would fall down by its own weight and entirely close the pipe.

. The object of myinvention is to overcome these difhculties; and it consists in the use of a curved or convex faced damper working within a box or shell, the sides of which are made spherical or convex to correspond to the form of the damper, which is hung or pivoted at or near the center of the box, and is retained open at the required point by a rack and Vpawl placed directly over one of the bearings, by which arrangement the pawl is not liable to be disengaged from the rack by any shaking or jarring to which it may be subjected. The form of the damper also causes any moisture or deposit which may collect to be carried away from the bearings into `the pipe below, thus protecting them from being clogged or rusted, and the damper, being made to project under the edge of the opening which it commands, can always be closed tight when required.

To enable others skilled in the art to understand and use my invention, I Will proceed to describe the manner in which I have carried it out.

In the said drawings, A is a spherical box or shell to which the smoke-funnel is connected above and below in the ordinary manner. In one side of this box is cut an air opening, B, ofthe required size, which is commanded by the valve or damper C, which is made of a curved or convex form to correspond to the form of the inside of the box A. This damper is pivoted to the box A at or near its center, and to one ot' its journals a is attached a rack, D, with the teeth of which a pawl, E, engages. This pawl is pivoted to the outer face ofthe box A immediately over the journal a of the damper, and is not liable to be disengaged from the teeth of the rack by any ja-r or shaking of the damper by the upper or lower edges of the opening B, thus preventing any liability of gas escaping into the room.

By pivoting the damper at or near the center of the shell A when it is turned up into a position to entirely close the air-inlet B, it will wedge slightly against the shell A, and this, together with the damper being made to project under the upper edge of the opening B, causes it to close the air-inlet tightly when required Without the necessity of accurately tting the teeth of the rack and the pawl to effect this end.

Any moisture or deposit which may collect on the damper `G'Will run down its curved surface into the smoke-pipe and away from the bearings, which are thus prevented from being clogged or rusted out and destroyed.

I do not confine myself to the exact form of the boX A and damper here shown, as it is or neer the center ofzt box, A, of correspondevident that they may be varied without de ing contour, operating substantially as departing from the spirit of my invention so sesibed, for the purpose specied. long as the curved or convex form is retained. x WM. J. TO WN E.

What I claim as my invention, and desire l NVitnesses: to secure by Letters Patent, is-- N. W. STEARNS,

The curved or convex damper C, pivoted at y P. E. TEsoI-IEMAGHER.

Ihn 

